6 mm Round Gemstones
Browse our collection of calibrated 6 mm round gemstones, perfect for standard jewelry settings and custom designs.
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Bi-color
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Black 6 mm Round Gems
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Blue 6 mm Round Gems
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Brown 6 mm Round Gems
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Golden 6 mm Round Gems
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Gray 6 mm Round Gems
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Green 6 mm Round Gems
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Multicolor 6 mm Round Gems
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Orange 6 mm Round Gems
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Pink 6 mm Round Gems
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Purple 6 mm Round Gems
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Red 6 mm Round Gems
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Turquoise
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Violet 6 mm Round Gems
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White 6 mm Round Gems
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Yellow 6 mm Round Gems
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Single |
Pairs |
Lots |
Faceted |
Cabochons |
1.14ct Light Red Ruby, Round, VS
6 mm (calibrated)
$ 123.12
1.06ct Orangish Pink Malaya Garnet, Round, VS
6 mm (calibrated)
$ 55.97
1.21ct Reddish Pink Ruby, Round, VS-SI
6 mm (calibrated)
$ 502.26
1.13ct Medium-Dark Orange Zircon, Round, VVS-VS
6 mm (calibrated)
$ 32.48
1.07ct Egyptian Blue Kyanite, Round, VS-SI
6 mm (calibrated)
$ 29.43
1.21ct Reddish Pink Ruby, Round, VS-SI
6 mm (calibrated)
$ 130.68
1.03ct Bubblegum Pink Tourmaline, Round, Transparent
6 mm (calibrated)
$ 20.57
1.20ct Medium Pink Tourmaline, Round, Transparent
6 mm (calibrated)
$ 23.96
4.24ctw Deep Orange Zircon, Round, VVS-VS
6 mm (calibrated)
$ 121.84
0.95ct Baby Blue Kyanite, Round, SI
6 mm (calibrated)
$ 28.50
0.88ct Medium Light-Yellow Tourmaline, Round, Transparent
6 mm (calibrated)
$ 21.12
4.75ctw Light Lively Green Peridot, Round, VVS-VS
6 mm (calibrated)
$ 50.84
0.84ct Light Pear Green Tourmaline, Round, Transparent
6 mm (calibrated)
$ 16.78
2.38ctw Deep Crimson Rubies, Round, VS
6 mm (calibrated)
$ 214.20
1.98ctw Multicolor Labradorite, Round, Translucent
6 mm (calibrated)
$ 2.86
0.89ct Medium Pink Tourmaline, Round, Transparent
6 mm (calibrated)
$ 17.77
1.07ct Deep Orange Hessonite Garnet, Round, VS
6 mm (calibrated)
$ 19.69
2.38ctw White Zircon, Round, VVS-VS
6 mm (calibrated)
$ 45.30
1.28ct Pinkish Red Ruby, Round, VS-SI
6 mm (calibrated)
$ 531.31
0.96ct Light Pear Green Tourmaline, Round, Transparent
6 mm (calibrated)
$ 19.16
0.86ct Pistachio Green Emerald, Round, Translucent
6 mm (calibrated)
$ 68.80
0.94ct Light Grey Tourmaline, Round, Transparent
6 mm (calibrated)
$ 22.56
0.93ct Pink Orange Tourmaline, Round, Transparent
6 mm (calibrated)
$ 18.58
1.08ct Deep Crimson Ruby, Round, VS-SI
6 mm (calibrated)
$ 116.64
Why Buy 6 Mm Round Gems from GemSelect?
- Trusted Worldwide Since 2003
- Supplying natural gemstones to jewelers and collectors in 120+ countries
- Verified natural gemstones
- View All GemSelect Reviews on Bizrate
- Secure checkout and insured worldwide delivery
- 30-day returns and satisfaction guarantee
Natural 6 mm Round Gemstones
Our natural 6 mm round gemstones are carefully selected for quality, brilliance, and accurate calibration. These gems are ideal for jewelers and designers who need stones that fit standard jewelry settings with precision.
Shop 6 mm Round Gemstones Online
Buy 6 mm round gemstones online at GemSelect with confidence. Our inventory includes a wide range of natural stones such as sapphire, ruby, garnet, amethyst, citrine and more, all available as loose gemstones ready for jewelry making.
Perfect Size for Standard Jewelry Settings
The 6 mm round gemstone size is one of the most popular calibrated sizes used in jewelry. It fits many standard ring, earring, and pendant mountings, making it an excellent choice for custom jewelry designs.
Wide Variety of Gemstone Types
Our selection of 6 mm round gemstones includes many popular gem types such as sapphire, ruby, topaz, garnet, peridot, and quartz varieties. This allows designers and collectors to find the ideal gemstone for any style or budget.
Faceted and Cabochon Options
Choose from sparkling faceted stones for maximum brilliance or smooth cabochon cuts for a softer appearance. Both cutting styles are available in the classic 6 mm round gemstone size.
Calibrated Gemstones for Jewelers
Calibrated gemstones are cut to precise measurements, making them easy to set into pre-made jewelry mountings. Our 6 mm round gemstones are ideal for jewelers who need consistency and accuracy in their designs.
Loose Gemstones for Custom Jewelry
Loose 6 mm round gemstones are perfect for creating custom jewelry pieces. Whether designing an engagement ring, earrings, or a pendant, these versatile stones offer balance, brilliance, and timeless appeal.
Wholesale 6 mm Round Gemstones
GemSelect offers competitive pricing on loose gemstones, including calibrated 6 mm round stones. Jewelers and collectors can find quality gems suitable for both small projects and larger jewelry production.
Learn more about gemstones, cuts, and jewelry design on our Gemstone Information pages.
FAQs
What does 6 mm mean in gemstones?
The measurement refers to the diameter of the gemstone. A 6 mm round gemstone is approximately 6 millimeters across, making it a common calibrated size used in jewelry settings.
Are 6 mm round gemstones good for rings?
Yes, 6 mm round gemstones are very popular for rings. They provide a balanced size that offers good visual presence without being too large for everyday wear.
Which gemstones are available in 6 mm round size?
Many gemstones are available in this calibrated size, including sapphire, ruby, garnet, amethyst, citrine, topaz, peridot, and other popular varieties.
Are 6 mm gemstones calibrated?
Yes, many 6 mm gemstones are cut to calibrated measurements so they can fit standard jewelry mountings designed for this size.
Can I buy 6 mm round gemstones for custom jewelry?
Absolutely. Loose 6 mm round gemstones are ideal for custom jewelry projects, allowing designers to choose the exact gemstone type, color, and quality they prefer.
GemSelect Certified Store Reviews
GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!
Overall Rating -> 10 
Easy to conduct search, good amount of stock to select from along with variety of prices.
Overall Rating -> 10
Very surprised how quick and efficient it was to checkout and pay. Also found exactly what I was looking for no issues.
Overall Rating -> 10
I love the gems and your website, every time I want to buy I usually spend between 6 and 8 hours on your website.
Overall Rating -> 10
Great selection. Maybe too great i kept adding and deleting stuff because i found better looking ones
Overall Rating -> 10
love the site, the experience and the products.
Overall Rating -> 8 
First time using this website. It was both exciting finding things in my price range and things Iam gonna save up for and use in other pieces. I love that the picture of the gem is the exact gem I'll be buying. I haven't tested the gems yes but they said they sold me 100% natural gems.
